Amprius Technologies (AMPX)
Makes silicon-anode batteries for drones, aviation, defense, and light electric mobility.
$9.87
vs last close−0.11 (−1.10%)
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13F · 13D/G · Form 4
| Institutions | ≈ 67.25% | 95.24M shares | |
|---|---|---|---|
| 296 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 12.30% | 17.42M shares | |
| 10 holders · as of Aug 25, 2026 | |||
| Other | ≈ 20.45% | 28.97M shares | |
| remainder | |||
141.63M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
13F, as of Jun 30, 2026
296 holders · 95.24M shares · 66 new positions · 177 increased · 67 reduced · 50 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 11.34M | 8.00% | +2.11M | Aug 7, 2026 |
| Vanguard Capital Management LLC | 5.56M | 3.93% | +654.1K | Aug 13, 2026 |
| Morgan Stanley | 5.11M | 3.60% | +1.94M | Aug 13, 2026 |
| Two Sigma Investments, LP | 4.32M | 3.05% | +812.6K | Aug 14, 2026 |
| UBS Group AG | 4.07M | 2.88% | +1.76M | Aug 13, 2026 |
| Geode Capital Management, LLC | 3.52M | 2.49% | +706.1K | Aug 12, 2026 |
| Jane Street Group, LLC | 3.40M | 2.40% | −759.6K | Aug 14, 2026 |
| State Street Corp | 3.24M | 2.29% | +527.7K | Aug 7, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| SAIF Partners IV L.P.incl. Saif Iv GP, L.P., Andrew Y. Yan +1 more | 7.60% | 8.01M | 13G | Oct 28, 2024 |
| Kang Sun | 6.80% | 7.77M | 13D | Oct 25, 2024 |
| Alan Salzman | 6.70% | 7.11M | 13G | Oct 25, 2024 |
| Trident Capital Management VI, L.L.C. | 6.50% | 6.91M | 13D | Oct 28, 2024 |
| BlackRock, Inc. | 5.80% | 7.30M | 13G | Oct 17, 2025 |
| Jane Street Group, LLC | 5.10% | 7.01M | 13G | Apr 28, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 24, 2026 | Thomas M. Stepiendirector, officer: Chief Executive Officer | Sale | 8,000 | $10.03 | 594,096 |
| Aug 21, 2026 | Thomas M. Stepiendirector, officer: Chief Executive Officer | Sale | 23,529 | $10.34 | 602,096 |
| Aug 21, 2026 | Constantin Ionel Stefanofficer: Chief Technology Officer | Sale | 29,681 | $10.34 | 771,629 |
| Aug 21, 2026 | Kang Sundirector | Sale | 62,101 | $10.34 | 1,218,397 |
| Jun 15, 2026 | Donald R. Dixondirector | Sale | 85,000 | $17.17 | 359,380 |
| Jun 9, 2026 | Donald R. Dixondirector | Sale | 40,000 | $19.13 | 444,380 |
| Jun 4, 2026 | Thomas M. Stepiendirector, officer: Chief Executive Officer | Sale | 2,000 | $20.97 | 625,625 |
| May 26, 2026 | Donald R. Dixondirector | Sale | 17,895 | $17.90 | 484,380 |
| May 27, 2026 | Constantin Ionel Stefanofficer: Chief Technology Officer | Sale | 3,208 | $17.19 | 801,310 |
| May 27, 2026 | Thomas M. Stepiendirector, officer: Chief Executive Officer | Sale | 4,375 | $17.19 | 694,923 |
House and Senate disclosures
Not reported.